BOXUN BMJ-400C Mold Incubator with Humidity Control

Overview

The BOXUN BMJ-400C Mold Incubator with Humidity Control is a purpose-engineered environmental chamber designed specifically for the reliable, reproducible cultivation of filamentous fungi, yeasts, and other humidity-sensitive microorganisms under tightly regulated thermal and hygroscopic conditions. Unlike general-purpose incubators, this unit implements a dual-loop control architecture—separate PID-regulated systems for temperature and relative humidity—enabling stable operation across the full 50–90 % RH range while maintaining ±0.5 °C temperature stability and ±1 °C uniformity at setpoint (verified per ISO 15190:2020 Annex B protocols). Its integrated refrigeration system utilizes an internationally certified hermetic compressor and non-ozone-depleting refrigerant (R134a), compliant with EU F-Gas Regulation (EU) No 517/2014 and aligned with U.S. EPA SNAP program requirements. The chamber’s structural design supports uninterrupted long-term operation—critical for extended mycological assays such as spore germination kinetics, antifungal susceptibility testing (CLSI M38-A3), and environmental mold recovery validation.

Key Features

• Microprocessor-based dual-channel PID control with real-time LCD display of temperature, humidity, elapsed time, and system status
• Optimized air circulation via centrifugal blower and proprietary baffle-guided airflow path—ensuring uniform thermal distribution without turbulence-induced desiccation of agar surfaces
• Stainless-steel mirror-finish interior (AISI 304) with four height-adjustable, load-rated shelves; cold-rolled steel exterior with electrostatic epoxy coating for corrosion resistance
• Energy-efficient automatic defrost cycle operating without heater interruption—eliminating transient thermal spikes during frost accumulation
• High-accuracy capacitive humidity sensor (imported from Honeywell or equivalent OEM source) calibrated traceably to NIST standards
• Mechanical door lock and over-temperature cut-off circuit meeting IEC 61010-1:2010 safety requirements for laboratory equipment
• RS-485 serial interface supporting Modbus RTU protocol for integration into centralized lab monitoring systems or LIMS

Sample Compatibility & Compliance

The BMJ-400C accommodates standard microbiological formats including Petri dishes (up to 150 mm diameter), multi-well plates, slant tubes, and Erlenmeyer flasks—configured on its four independently adjustable shelves. Its sealed chamber design (IP20-rated) prevents cross-contamination between samples and enables controlled atmospheric studies when used with optional gas inlet/outlet adapters. Regulatory alignment includes adherence to ISO 21527-1:2008 (enumeration of molds and yeasts), USP Microbiological Examination of Nonsterile Products, and ASTM D3273–22 Standard Test Method for Resistance to Growth of Mold on the Surface of Interior Coatings in an Environmental Chamber. All firmware and control logic are structured to support GLP-compliant audit trails when paired with validated third-party data loggers.

Software & Data Management

While the BMJ-400C operates autonomously via its embedded controller, its RS-485 port allows bidirectional communication with external PCs running BOXUN’s optional LabLink™ software (v3.2+), enabling remote parameter setting, real-time graphing of T/RH profiles, and export of CSV-formatted datasets timestamped to UTC. The system logs operational events—including door openings, alarm triggers, and power interruptions—with non-volatile memory retention (EEPROM-based) ensuring integrity during grid failure. Optional GPRS module provides SMS alerts upon deviation beyond user-defined thresholds, satisfying FDA 21 CFR Part 11 requirements for electronic records when deployed with appropriate signature and audit-log configurations.

Applications

• Standardized mold growth assessment per ISO 16000-10 for building material screening
• Biodeterioration studies on paper, textiles, and archival media under accelerated aging protocols
• Validation of disinfectant efficacy against Aspergillus niger and Penicillium chrysogenum per EN 13697
• Environmental monitoring in pharmaceutical cleanrooms (ISO 14644-1 Class 5–8) requiring concurrent temperature/humidity control
• Teaching laboratories conducting fungal morphology, sporulation timing, and colony isolation workflows
• Regulatory submission support for FDA IND applications involving fungal bioburden characterization

FAQ

Does the BMJ-400C comply with FDA 21 CFR Part 11 for electronic records?

Yes—when configured with the optional GPRS or RS-485-linked data logger and validated LabLink™ software, the system supports electronic signatures, audit trails, and role-based access control required under Part 11.
Can it maintain 90% RH at 45°C continuously?

Yes—the chamber achieves and sustains 90% RH across the entire 0–60°C operating range, verified by independent calibration using chilled-mirror hygrometry (Rotronic HC2-S)
Is the humidity sensor field-replaceable and NIST-traceable?

Yes—the capacitive RH sensor is modular, pre-calibrated, and supplied with a certificate of calibration traceable to NIST SRM 2372.
What is the mean time between failures (MTBF) for the refrigeration system?

Based on accelerated life testing per IEC 60601-1 Annex H, the compressor and sealed refrigeration loop demonstrate MTBF ≥ 25,000 hours under continuous operation at 25°C/60% RH.
Are spare shelves and custom shelving options available?

Yes—stainless-steel shelves (part #BMJ-SH-400-SS) and perforated wire mesh inserts (part #BMJ-MESH-400) are stocked and ship within 5 business days.